Display Device Through-Hole Connection Structure
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Solution Overview
Problem
Current display devices with integrated touch sensors face challenges in maintaining display quality due to increased contact resistance and light leakage, particularly in the alignment of through-holes for connection electrodes, which can lead to degradation in display performance.
Innovation Solution
The implementation of a display device structure that includes a switching element with a drain electrode, organic insulating films with through-holes, and metal connection electrodes, which ensures electrical connectivity between the drain and pixel electrodes while minimizing contact resistance and light leakage by using organic insulating materials and specific electrode layouts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If through-holes are used for connection electrodes to ensure electrical connectivity, then electrical connectivity between drain and pixel electrodes is improved, but contact resistance increases and light leakage occurs
Solution Approach 1:
The connection structure is divided into multiple segments: through-holes for electrical connection, organic insulating films to prevent light leakage, and metal connection electrodes for low-resistance pathways. This segmentation allows each component to address specific issues independently while working together to resolve the overall contradiction.
Solution Approach 2:
Organic insulating films are introduced as intermediary materials between the through-holes and the external environment. These films serve as mediators that prevent light leakage through the through-holes while maintaining electrical connectivity, thus resolving the contradiction between connectivity and light leakage prevention.
2Reliability
If metal connection electrodes are used to reduce contact resistance, then electrical conductivity is improved, but manufacturing complexity increases
Solution Approach 1:
The metal connection electrodes are merged with the existing electrode structure and formed using the same manufacturing processes as other metal layers in the display device. This integration approach reduces manufacturing complexity while achieving low contact resistance, as no additional specialized processes are required.
Solution Approach 2:
The metal connection electrodes serve multiple functions: providing low-resistance electrical pathways, maintaining structural integrity, and being formed using standard manufacturing processes. This multi-functionality reduces overall device complexity while achieving the goal of reduced contact resistance.
3Object-affected harmful factors
If organic insulating materials are used in through-holes to prevent light leakage, then light leakage is suppressed, but manufacturing precision requirements increase
Solution Approach 1:
The organic insulating materials are applied as films with controlled thickness parameters that provide sufficient light blocking capability. By optimizing the film thickness and material properties, the patent achieves light leakage suppression while maintaining reasonable manufacturing precision requirements for through-hole formation.
Data Source
AI summary
According to one embodiment, a display device includes a switching element including a drain electrode, a first insulating film including a first through-hole penetrated to the drain electrode, and being formed of an organic insulating material, a first connection electrode which is in contact with the drain electrode at the first through-hole, and is formed of a metal material, a second insulating film which is located on the first insulating film, is formed of an organic insulating material, and includes a second through-hole penetrated to the first connection electrode, and a pixel electrode electrically connected to the first connection electrode.